AMD Instinct MI355X vs NVIDIA GB10 Comparison

Head-to-Head Benchmarks

The recorded data provides no direct head-to-head benchmark results between the AMD Instinct MI355X and the NVIDIA GB10, as the head-to-head test suite is empty. However, the available information allows for a meaningful comparison of their relative standing in the database. The NVIDIA GB10 has an average benchmark score of 117,393 across two tests, placing it in the 95th percentile of all GPUs. The AMD Instinct MI355X, by contrast, has no recorded benchmark scores and sits in the 50th percentile, with an average score of zero. This indicates that the database currently has no measurable performance data for the MI355X, making a direct numerical performance comparison impossible from the recorded measurements.

The NVIDIA GB10's benchmark results show a Geekbench OpenCL score of 120,137 and a Geekbench Vulkan score of 114,648. These scores position it closely against several known rivals. The nearest rival, the NVIDIA RTX 4000 SFF Ada Generation, has an average score of 117,088, which puts the GB10 0.3% ahead. The AMD Radeon PRO W7700 scores 118,976, placing it 1.3% below that figure, meaning the GB10 trails that card by 1.3%. The GB10 leads the NVIDIA Tesla V100 SXM2 16 GB, which scores 114,395, by 2.6%. It also leads the NVIDIA RTX A5500 Mobile, which scores 113,944, by 3%. These deltas show that the GB10's performance is tightly clustered with the RTX 4000 SFF Ada Generation and the Radeon PRO W7700, while it holds a small but consistent advantage over the older Tesla V100 and the RTX A5500 Mobile.

The raw specifications paint a different picture of theoretical capability. The MI355X offers a FP32 compute rate of 78.64 TFLOPS, which is far higher than the GB10's 29.71 TFLOPS. The texture rate tells a similar story: the MI355X reaches 2,457.6 GTexel/s compared to the GB10's 928.5 GTexel/s. The memory bandwidth gap is enormous, with the MI355X delivering 8.19 TB/s versus 273.2 GB/s for the GB10. No benchmark scores exist to confirm how these theoretical peaks translate into real workloads, but the specification differences are substantial.

FAQ

Q: What is the average benchmark score of the NVIDIA GB10?

A: The GB10 has an average benchmark score of 117,393, based on its Geekbench OpenCL score of 120,137 and Geekbench Vulkan score of 114,648.

Q: How does the NVIDIA GB10 compare to its nearest rivals in the database?

A: The GB10 is 0.3% ahead of the NVIDIA RTX 4000 SFF Ada Generation, 1.3% behind the AMD Radeon PRO W7700, 2.6% ahead of the NVIDIA Tesla V100 SXM2 16 GB, and 3% ahead of the NVIDIA RTX A5500 Mobile.

Q: Does the AMD Instinct MI355X have any recorded benchmark scores?

A: No, the MI355X has no benchmark entries in the database, and its average benchmark score is recorded as zero.

Q: What is the memory configuration of each card?

A: The MI355X has 288 GB of HBM3e memory on a 8192-bit bus with 8.19 TB/s bandwidth. The GB10 has 128 GB of LPDDR5X memory on a 256-bit bus with 273.2 GB/s bandwidth.

Q: What is the thermal design power of each card?

A: The MI355X has a TDP of 1400 W and a suggested PSU of 1800 W. The GB10 has a TDP of 140 W and a suggested PSU of 300 W.

Q: What is the release date for each product?

A: The MI355X was released on 2025-06-11, and the GB10 was released on 2025-10-14.

Q: Are the APIs supported different between the two cards?

A: Both cards report N/A for DirectX, OpenGL, and Vulkan APIs in the database.

Architecture Differences

The AMD Instinct MI355X uses the CDNA 4.0 architecture on a chip designated MI350 256CU, built on a 3 nm process at TSMC. The NVIDIA GB10 uses the Blackwell 2.0 architecture on a chip designated GB20B, built on a 5 nm process, also at TSMC. The MI355X integrates 185,000 million transistors on a die size of 2380 mm², giving a transistor density of 77.7 million transistors per square millimeter. The GB10 has an unknown transistor count and a die size of 382 mm².

The MI355X has no RT cores and no tensor cores listed, while the GB10 includes 48 RT cores and 384 tensor cores. The MI355X has 16,384 shading units, 1,024 texture mapping units, and zero ROPs, with a pixel rate of 0 MPixel/s. The GB10 has 6,144 shading units, 384 TMUs, and 48 ROPs, with a pixel rate of 116.1 GPixel/s. The MI355X uses HBM3e memory, while the GB10 uses LPDDR5X. The MI355X reports no display outputs, while the GB10 has one HDMI output. The MI355X is an OAM module, while the GB10 is an IGP form factor.

The MI355X memory clock is listed as 2000 MHz with 8 Gbps effective speed, and the GB10 memory clock is 1067 MHz with 8.5 Gbps effective speed. The MI355X base clock is 1000 MHz with a boost of 2400 MHz, whereas the GB10 has a base clock of 1665 MHz and a boost of 2418 MHz. The MI355X has no production status recorded, while the GB10 is marked as active. The MI355X predecessor is listed as Radeon Instinct with no successor, and the GB10 predecessor is Server Hopper with a successor of Server Rubin.

Specification Differences

The two cards differ across nearly every measurable specification. The process node differs: the MI355X is on 3 nm, the GB10 on 5 nm. Transistor count is 185,000 million for the MI355X versus unknown for the GB10. Die size is 2380 mm² versus 382 mm². Transistor density is 77.7M per mm² for the MI355X, with no density recorded for the GB10.

Clock speeds differ in both base and boost. The MI355X runs at a 1000 MHz base and 2400 MHz boost, while the GB10 runs at 1665 MHz base and 2418 MHz boost. Memory clocks also differ: 2000 MHz with 8 Gbps effective for the MI355X, and 1067 MHz with 8.5 Gbps effective for the GB10.

Memory specifications are vastly different. The MI355X has 288 GB of HBM3e on a 8192-bit bus with 8.19 TB/s bandwidth. The GB10 has 128 GB of LPDDR5X on a 256-bit bus with 273.2 GB/s bandwidth.

Compute resources differ significantly. The MI355X has 16,384 shading units, 1,024 TMUs, and 0 ROPs. The GB10 has 6,144 shading units, 384 TMUs, and 48 ROPs. The MI355X has no RT cores or tensor cores listed, while the GB10 has 48 RT cores and 384 tensor cores. Pixel rate is 0 MPixel/s for the MI355X versus 116.1 GPixel/s for the GB10. Texture rate is 2,457.6 GTexel/s versus 928.5 GTexel/s. FP32 performance is 78.64 TFLOPS for the MI355X versus 29.71 TFLOPS for the GB10. FP16 performance follows the same pattern at 78.64 TFLOPS versus 29.71 TFLOPS, both at 1:1 ratios.

Power requirements differ by an order of magnitude. The MI355X has a TDP of 1400 W and a suggested PSU of 1800 W. The GB10 has a TDP of 140 W and a suggested PSU of 300 W. Neither card uses power connectors, and both use PCIe 5.0 x16 interfaces.

Form factors differ. The MI355X is an OAM module measuring 102 mm in length and 165 mm in width. The GB10 is an IGP measuring 150 mm in length, 51 mm in height, and 150 mm in width. The MI355X has no display outputs, while the GB10 has one HDMI output.

Release dates differ: the MI355X launched on 2025-06-11, and the GB10 launched on 2025-10-14. The GB10 has a launch MSRP of 3,999 USD. The MI355X has no launch MSRP recorded. The GB10 has a production status of Active, while the MI355X has no production status.

Where Each One Wins

The AMD Instinct MI355X wins on raw compute capacity. Its FP32 throughput of 78.64 TFLOPS is roughly 2.6 times the GB10's 29.71 TFLOPS. Its texture rate of 2,457.6 GTexel/s is about 2.6 times the GB10's 928.5 GTexel/s. The memory subsystem is the largest advantage: 8.19 TB/s of bandwidth versus 273.2 GB/s is a massive gap, and 288 GB of HBM3e versus 128 GB of LPDDR5X doubles the capacity. The MI355X also has more than double the shading units and nearly triple the TMUs. For workloads that scale with raw compute, memory bandwidth, or memory capacity, the MI355X's specifications are far ahead.

The NVIDIA GB10 wins on power efficiency and form factor. Its TDP of 140 W is one-tenth of the MI355X's 1400 W, and its suggested PSU of 300 W is far lower than the 1800 W suggested for the MI355X. The GB10 is an IGP, which means it can fit in compact systems, whereas the MI355X is an OAM module. The GB10 also has features the MI355X lacks: 48 RT cores, 384 tensor cores, 48 ROPs, and one HDMI output. The GB10 has recorded benchmark scores and a 95th percentile ranking, while the MI355X has no benchmark data. The GB10 also has a confirmed active production status.

The GB10's benchmark results show it sits close to the RTX 4000 SFF Ada Generation and the Radeon PRO W7700, while leading the Tesla V100 SXM2 16 GB and the RTX A5500 Mobile. The MI355X has no such database results to compare, so its standing among peer accelerators is unmeasured.

The Verdict

The data shows two very different products. The AMD Instinct MI355X is a high-power, high-bandwidth accelerator designed around massive memory capacity and raw compute. Its specifications point to workloads that demand enormous memory bandwidth and FP32 throughput, but the database has no benchmark scores to confirm real-world behavior. The NVIDIA GB10 is a compact, low-power part with recorded benchmark results, a 95th percentile ranking, and a clear position relative to several known rivals.

For users who need the highest available memory bandwidth and FP32 compute per the recorded specifications, the MI355X is the only choice between these two, but its power draw and OAM form factor require a server platform built for it. For users who need a small, low-power device with verified benchmark performance, display output, and tensor and RT core support, the GB10 is the practical option. The MI355X has no launch MSRP recorded, while the GB10 has a launch MSRP of 3,999 USD. Neither card supports standard graphics APIs, so both are aimed at compute or specialized tasks rather than general rendering.

The GB10's benchmark data confirms it performs within a few percentage points of the RTX 4000 SFF Ada Generation and the Radeon PRO W7700, and it holds a small lead over the Tesla V100 SXM2 16 GB. The MI355X's theoretical specifications are far higher, but without recorded measurements, those numbers remain unverified in the database. The verdict depends on whether the workload prioritizes the MI355X's massive memory and compute envelope or the GB10's verified, low-power, compact design.